We have created a low cost, lightweight solution for audio augmented realities and a prototype role-playing game that utilizes and demonstrates this infrastructure. Our sample application required special attention to the construction of the sound environment. We found that three layers of audio (ambient sounds, sound effects and narration) are important in creating the immersive augmented reality game. Although we have used this system to implement an immersive gaming environment, the infrastructure we created has many possible uses. It can be configured to support applications that range from simple reactive audio tour guides to rich systems that allow for complex interaction between the users and environment.